1.:用户权利指派(User Rights Assignment)-->从网络访问此计算机(Access this computer from the network)-->添加Guest组.
2.:用户权利指派(User Rights Assignment)-->拒绝从网络访问这台计算机(Deny access to this computer from the network)-->删除Guest组.
3.:安全选项(Security Options)-->网络访问:本地账户的共享和安全模式(Network access:Sharing and security model for local accounts)-->更改为经典模式.